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The crystal used as X-ray grating has _______ dimensional lattice arrays.

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The crystal used as X-ray grating has _______ dimensional lattice arrays.

(a) One

(b) Two

(c) Three

(d) Four

I have been asked this question in semester exam.

Asked question is from X-Ray Fluorescent Spectrometer in portion X-Ray Spectrometers of Analytical Instrumentation

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Best answer
Right choice is (c) Three

Explanation: The crystal used as X-ray grating has three dimensional lattice arrays. Photons can be coherently scattered using the crystals.

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